Malware Analysis Report

2025-04-13 11:57

Sample ID 240818-11rv5azgql
Target fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
SHA256 fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
Tags
skids quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e

Threat Level: Known bad

The file fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e was found to be: Known bad.

Malicious Activity Summary

skids quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-18 22:07

Signatures

Quasar family

quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-18 22:07

Reported

2024-08-18 22:10

Platform

win7-20240704-en

Max time kernel

132s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1072 wrote to memory of 2084 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\schtasks.exe
PID 1072 wrote to memory of 2084 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\schtasks.exe
PID 1072 wrote to memory of 2084 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\schtasks.exe
PID 1072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 1072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 1072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 2804 wrote to memory of 2828 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe
PID 2804 wrote to memory of 2828 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe
PID 2804 wrote to memory of 2828 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe

"C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp

Files

memory/1072-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

memory/1072-1-0x0000000000D60000-0x00000000010B8000-memory.dmp

memory/1072-2-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

C:\Windows\System32\Windows\Windows Host Process.exe

MD5 7021b44ffa619a2a286dd9bd55d1e321
SHA1 de69ec28f445e6c47b1d2f4440465f3ffc2df174
SHA256 fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
SHA512 546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13

memory/2804-8-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/2804-9-0x0000000000B20000-0x0000000000E78000-memory.dmp

memory/1072-10-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/2804-11-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/2804-12-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-18 22:07

Reported

2024-08-18 22:09

Platform

win10v2004-20240802-en

Max time kernel

141s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.exe N/A
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe

"C:\Users\Admin\AppData\Local\Temp\fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4280,i,10065386245627775856,6567048529106473151,262144 --variations-seed-version --mojo-platform-channel-handle=1044 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 147.185.221.22:6712 tcp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 147.185.221.22:6712 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 147.185.221.22:6712 tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 147.185.221.22:6712 tcp
US 147.185.221.22:6712 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 147.185.221.22:6712 tcp

Files

memory/1956-0-0x00007FFAABA03000-0x00007FFAABA05000-memory.dmp

memory/1956-1-0x00000000008D0000-0x0000000000C28000-memory.dmp

memory/1956-2-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp

C:\Windows\System32\Windows\Windows Host Process.exe

MD5 7021b44ffa619a2a286dd9bd55d1e321
SHA1 de69ec28f445e6c47b1d2f4440465f3ffc2df174
SHA256 fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
SHA512 546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13

memory/2320-9-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp

memory/1956-10-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp

memory/2320-11-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp

memory/2320-12-0x000000001BC10000-0x000000001BC60000-memory.dmp

memory/2320-13-0x000000001BD20000-0x000000001BDD2000-memory.dmp

memory/2320-14-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp